/* * tclGet.c -- * * This file contains procedures to convert strings into * other forms, like integers or floating-point numbers or * booleans, doing syntax checking along the way. * * Copyright (c) 1990-1993 The Regents of the University of California. * Copyright (c) 1994-1997 Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclGet.c,v 1.1.1.1 2007/07/10 15:04:23 duncan Exp $ */ #include "tclInt.h" #include "tclPort.h" #include "tclMath.h" /* *---------------------------------------------------------------------- * * Tcl_GetInt -- * * Given a string, produce the corresponding integer value. * * Results: * The return value is normally TCL_OK; in this case *intPtr * will be set to the integer value equivalent to string. If * string is improperly formed then TCL_ERROR is returned and * an error message will be left in the interp's result. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_GetInt(interp, string, intPtr) Tcl_Interp *interp; /* Interpreter to use for error reporting. */ CONST char *string; /* String containing a (possibly signed) * integer in a form acceptable to strtol. */ int *intPtr; /* Place to store converted result. */ { char *end; CONST char *p = string; long i; /* * Note: use strtoul instead of strtol for integer conversions * to allow full-size unsigned numbers, but don't depend on strtoul * to handle sign characters; it won't in some implementations. */ errno = 0; #ifdef TCL_STRTOUL_SIGN_CHECK /* * This special sign check actually causes bad numbers to be allowed * when strtoul. I can't find a strtoul that doesn't validly handle * signed characters, and the C standard implies that this is all * unnecessary. [Bug #634856] */ for ( ; isspace(UCHAR(*p)); p++) { /* INTL: ISO space. */ /* Empty loop body. */ } if (*p == '-') { p++; i = -((long)strtoul(p, &end, 0)); /* INTL: Tcl source. */ } else if (*p == '+') { p++; i = strtoul(p, &end, 0); /* INTL: Tcl source. */ } else #else i = strtoul(p, &end, 0); /* INTL: Tcl source. */ #endif if (end == p) { badInteger: if (interp != (Tcl_Interp *) NULL) { Tcl_AppendResult(interp, "expected integer but got \"", string, "\"", (char *) NULL); TclCheckBadOctal(interp, string); } return TCL_ERROR; } /* * The second test below is needed on platforms where "long" is * larger than "int" to detect values that fit in a long but not in * an int. */ if ((errno == ERANGE) #if (LONG_MAX > INT_MAX) || (i > UINT_MAX) || (i < -(long)UINT_MAX) #endif ) { if (interp != (Tcl_Interp *) NULL) { Tcl_SetResult(interp, "integer value too large to represent", TCL_STATIC); Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", Tcl_GetStringResult(interp), (char *) NULL); } return TCL_ERROR; } while ((*end != '\0') && isspace(UCHAR(*end))) { /* INTL: ISO space. */ end++; } if (*end != 0) { goto badInteger; } *intPtr = (int) i; return TCL_OK; } /* *---------------------------------------------------------------------- * * TclGetLong -- * * Given a string, produce the corresponding long integer value. * This routine is a version of Tcl_GetInt but returns a "long" * instead of an "int". * * Results: * The return value is normally TCL_OK; in this case *longPtr * will be set to the long integer value equivalent to string. If * string is improperly formed then TCL_ERROR is returned and * an error message will be left in the interp's result if interp * is non-NULL. * * Side effects: * None. * *---------------------------------------------------------------------- */ int TclGetLong(interp, string, longPtr) Tcl_Interp *interp; /* Interpreter used for error reporting * if not NULL. */ CONST char *string; /* String containing a (possibly signed) * long integer in a form acceptable to * strtoul. */ long *longPtr; /* Place to store converted long result. */ { char *end; CONST char *p = string; long i; /* * Note: don't depend on strtoul to handle sign characters; it won't * in some implementations. */ errno = 0; #ifdef TCL_STRTOUL_SIGN_CHECK for ( ; isspace(UCHAR(*p)); p++) { /* INTL: ISO space. */ /* Empty loop body. */ } if (*p == '-') { p++; i = -(int)strtoul(p, &end, 0); /* INTL: Tcl source. */ } else if (*p == '+') { p++; i = strtoul(p, &end, 0); /* INTL: Tcl source. */ } else #else i = strtoul(p, &end, 0); /* INTL: Tcl source. */ #endif if (end == p) { badInteger: if (interp != (Tcl_Interp *) NULL) { Tcl_AppendResult(interp, "expected integer but got \"", string, "\"", (char *) NULL); TclCheckBadOctal(interp, string); } return TCL_ERROR; } if (errno == ERANGE) { if (interp != (Tcl_Interp *) NULL) { Tcl_SetResult(interp, "integer value too large to represent", TCL_STATIC); Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", Tcl_GetStringResult(interp), (char *) NULL); } return TCL_ERROR; } while ((*end != '\0') && isspace(UCHAR(*end))) { /* INTL: ISO space. */ end++; } if (*end != 0) { goto badInteger; } *longPtr = i; return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_GetDouble -- * * Given a string, produce the corresponding double-precision * floating-point value. * * Results: * The return value is normally TCL_OK; in this case *doublePtr * will be set to the double-precision value equivalent to string. * If string is improperly formed then TCL_ERROR is returned and * an error message will be left in the interp's result. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_GetDouble(interp, string, doublePtr) Tcl_Interp *interp; /* Interpreter used for error reporting. */ CONST char *string; /* String containing a floating-point number * in a form acceptable to strtod. */ double *doublePtr; /* Place to store converted result. */ { char *end; double d; errno = 0; d = strtod(string, &end); /* INTL: Tcl source. */ if (end == string) { badDouble: if (interp != (Tcl_Interp *) NULL) { Tcl_AppendResult(interp, "expected floating-point number but got \"", string, "\"", (char *) NULL); } return TCL_ERROR; } if (errno != 0 && (d == HUGE_VAL || d == -HUGE_VAL || d == 0)) { if (interp != (Tcl_Interp *) NULL) { TclExprFloatError(interp, d); } return TCL_ERROR; } while ((*end != 0) && isspace(UCHAR(*end))) { /* INTL: ISO space. */ end++; } if (*end != 0) { goto badDouble; } *doublePtr = d; return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_GetBoolean -- * * Given a string, return a 0/1 boolean value corresponding * to the string. * * Results: * The return value is normally TCL_OK; in this case *boolPtr * will be set to the 0/1 value equivalent to string. If * string is improperly formed then TCL_ERROR is returned and * an error message will be left in the interp's result. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_GetBoolean(interp, string, boolPtr) Tcl_Interp *interp; /* Interpreter used for error reporting. */ CONST char *string; /* String containing a boolean number * specified either as 1/0 or true/false or * yes/no. */ int *boolPtr; /* Place to store converted result, which * will be 0 or 1. */ { int i; char lowerCase[10], c; size_t length; /* * Convert the input string to all lower-case. * INTL: This code will work on UTF strings. */ for (i = 0; i < 9; i++) { c = string[i]; if (c == 0) { break; } if ((c >= 'A') && (c <= 'Z')) { c += (char) ('a' - 'A'); } lowerCase[i] = c; } lowerCase[i] = 0; length = strlen(lowerCase); c = lowerCase[0]; if ((c == '0') && (lowerCase[1] == '\0')) { *boolPtr = 0; } else if ((c == '1') && (lowerCase[1] == '\0')) { *boolPtr = 1; } else if ((c == 'y') && (strncmp(lowerCase, "yes", length) == 0)) { *boolPtr = 1; } else if ((c == 'n') && (strncmp(lowerCase, "no", length) == 0)) { *boolPtr = 0; } else if ((c == 't') && (strncmp(lowerCase, "true", length) == 0)) { *boolPtr = 1; } else if ((c == 'f') && (strncmp(lowerCase, "false", length) == 0)) { *boolPtr = 0; } else if ((c == 'o') && (length >= 2)) { if (strncmp(lowerCase, "on", length) == 0) { *boolPtr = 1; } else if (strncmp(lowerCase, "off", length) == 0) { *boolPtr = 0; } else { goto badBoolean; } } else { badBoolean: if (interp != (Tcl_Interp *) NULL) { Tcl_AppendResult(interp, "expected boolean value but got \"", string, "\"", (char *) NULL); } return TCL_ERROR; } return TCL_OK; }